#!/usr/bin/env julia

"""
Functional test suite for PDEJulia.jl

Tests only the functionality that is actually implemented, focusing on
building up a working test suite incrementally.
"""

using Pkg
Pkg.activate(".")

println("=== PDEJulia.jl Functional Test Suite ===")

# Test minimal dependencies first
println("\n1. Testing minimal dependencies...")
try
    using LinearAlgebra
    using SparseArrays
    println("✓ Basic dependencies loaded")
catch e
    println("✗ Failed to load basic dependencies: $e")
    exit(1)
end

# Test individual source files
println("\n2. Testing individual source files...")

function test_file(filepath, description)
    try
        include(filepath)
        println("✓ $description")
        return true
    catch e
        println("✗ $description: $e")
        return false
    end
end

# Test what we can load step by step
basic_files = [
    ("src/grids/base.jl", "Grid base types"),
    ("src/grids/boundaries.jl", "Boundary conditions"),
    ("src/grids/cartesian.jl", "Cartesian grid implementation"),
    ("src/fields/base.jl", "Field base types"),
    ("src/fields/scalar.jl", "Scalar field implementation")
]

loaded_files = []
for (file, desc) in basic_files
    if isfile(file) && test_file(file, desc)
        push!(loaded_files, file)
    end
end

# If basic files loaded, try to test simple operations
if length(loaded_files) >= 3
    println("\n3. Testing basic functionality...")
    
    try
        # Test creating a simple grid (if implemented)
        println("Testing grid creation...")
        
        # Look at what's actually in the cartesian.jl file
        cartesian_content = read("src/grids/cartesian.jl", String)
        if occursin("UnitGrid", cartesian_content)
            println("  Found UnitGrid definition")
        end
        if occursin("CartesianGrid", cartesian_content)
            println("  Found CartesianGrid definition") 
        end
        
        println("✓ Basic analysis complete")
        
    catch e
        println("✗ Error testing functionality: $e")
    end
end

println("\n4. Testing package structure...")

# Count what's implemented vs planned
total_modules = ["grids", "fields", "pdes", "solvers", "storage", "trackers", "visualization", "tools"]
local implemented = 0
for mod in total_modules
    if isdir("src/$mod") && isfile("src/$mod/$mod.jl")
        implemented += 1
        println("  ✓ $mod module structure exists")
    else
        println("  ✗ $mod module missing or incomplete")
    end
end

println("\n=== Summary ===")
println("Files tested: $(length(loaded_files))/$(length(basic_files))")
println("Modules implemented: $implemented/$(length(total_modules))")

if implemented >= 6
    println("Status: Ready for comprehensive testing")
    println("Recommendation: Proceed with integration tests")
else
    println("Status: Basic structure needs completion")
    println("Recommendation: Complete missing modules before full testing")
end

println("\n=== Test Complete ===")